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Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p15 / 4.3.x < 4.3.101 DoS

medium Nessus Plugin ID 138356

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Synopsis

The remote NTP server is affected by a denial of service vulnerability.

Description

The version of the remote NTP server is 4.x prior to 4.2.8p15, or is 4.3.x prior to 4.3.101. It is, therefore, affected by a denial of service vulnerability due to a flaw in handling unauthenticated synchronization traffic. An authenticated attacker can exploit this issue to cause denial of service.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to NTP version 4.2.8p15, 4.3.101 or later.

See Also

https://support.ntp.org/bin/view/Main/NtpBug3661

Plugin Details

Severity: Medium

ID: 138356

File Name: ntp_4_2_8p15.nasl

Version: 1.3

Type: remote

Family: Misc.

Published: 7/10/2020

Updated: 7/22/2020

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P

CVSS Score Source: CVE-2020-15025

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:ntp:ntp

Required KB Items: Settings/ParanoidReport, NTP/Running

Exploit Ease: No known exploits are available

Patch Publication Date: 6/23/2020

Vulnerability Publication Date: 6/23/2020

Reference Information

CVE: CVE-2020-15025

IAVA: 2020-A-0289